A magnetic disk drive. A cartridge for accommodating a magnetic recording medium also accommodates an actuator and a spindle. The spindle accommodated in the cartridge is driven by a spindle driving mechanism provided in a driving device so as to rotate the magnetic recording medium. The actuator is...http://www.google.de/patents/US5235481?utm_source=gb-gplus-sharePatent US5235481 - Magnetic disk drive having a cartridge with actuator and spindle
